Synthesis and characterization of mechanically alloyed cerium oxide reinforced Al-4.5Mg alloy composite
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Sara Rastgarnia
Abstract
Al-4.5Mg-0.5Mn alloy powders were mechanically alloyed by the addition of 1–3 wt.% cerium oxide (CeO2) nanoparticles using a planetary ball mill under a dry argon atmosphere. A milling speed of 300 rpm and ball to powder ratio of 20:1 was used for all samples. An optimum milling time of 20 h was chosen considering the morphological and structural changes in the milled powders. The composite powders were consolidated via vacuum hot pressing at 515°C. Mechanical properties were evaluated by hardness and compression tests. The evolution of the structure and microstructure during the milling process was studied using X-ray diffraction and field emission scanning electron microscopy, respectively. The corrosion behavior of the samples was investigated by potentiodynamic polarization testing in a standard 3.5% chloride salt solution and assessed in terms of pitting potential and passivation range. CeO2 reinforced mechanically alloyed Al-4.5Mg exhibited a major improvement in its hardness and compressive strength compared to the un-reinforced base alloy, i.e. 40 and 50% increment respectively. Nevertheless, the most important effect of CeO2 incorporation was observed in the pitting resistance of the alloy.
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© 2017, Carl Hanser Verlag, München
Artikel in diesem Heft
- Contents
- Contents
- Original Contributions
- First principles, thermal stability and thermodynamic assessment of the binary Ni–W system
- Experimental evaluation of forming limit diagram and mechanical properties of nano/ultra-fine grained aluminum strips fabricated by accumulative roll bonding
- FSW of bimodal reinforced Al-based composites produced via spark plasma sintering
- Modelling analysis and experiments of polycrystalline silicon directional solidification in an annular heating field
- Effect of flow, heat transfer and magnetic energy on the grain refinement of 7A04 alloy under electromagnetic pulse
- A study on effects of a new two-step strain induced melt activation process on characteristics of Al 7075 alloy
- Synthesis and characterization of mechanically alloyed cerium oxide reinforced Al-4.5Mg alloy composite
- Densification rate and interfacial adhesion of bilayer cemented tungsten carbide and steel
- Short Communications
- Cavitation erosion of 17-4 PH stainless steels following sub-zero treatment
- Investigation on microstructure and thermal properties of in-situ synthesized Cu–ZrO2 nanocomposites
- DGM News
- DGM News
Artikel in diesem Heft
- Contents
- Contents
- Original Contributions
- First principles, thermal stability and thermodynamic assessment of the binary Ni–W system
- Experimental evaluation of forming limit diagram and mechanical properties of nano/ultra-fine grained aluminum strips fabricated by accumulative roll bonding
- FSW of bimodal reinforced Al-based composites produced via spark plasma sintering
- Modelling analysis and experiments of polycrystalline silicon directional solidification in an annular heating field
- Effect of flow, heat transfer and magnetic energy on the grain refinement of 7A04 alloy under electromagnetic pulse
- A study on effects of a new two-step strain induced melt activation process on characteristics of Al 7075 alloy
- Synthesis and characterization of mechanically alloyed cerium oxide reinforced Al-4.5Mg alloy composite
- Densification rate and interfacial adhesion of bilayer cemented tungsten carbide and steel
- Short Communications
- Cavitation erosion of 17-4 PH stainless steels following sub-zero treatment
- Investigation on microstructure and thermal properties of in-situ synthesized Cu–ZrO2 nanocomposites
- DGM News
- DGM News
